Zep (getzep.com) provides enterprise-grade persistent memory for AI agents via a temporal knowledge graph that tracks how facts and relationships change over time. It delivers sub-200ms retrieval and surfaces patterns, recurrences, and co-occurrences across conversations and structured business data. Zep ranked first on LongMemEval with a 63.8% score versus Mem0's 49.0%, and 94.8% on the DMR Benchmark. As of Q2 2026, its Graphiti repository has over 27,000 GitHub stars. The company is separate from ZEP GmbH (German time-tracking software); the URL getzep.com is the correct reference. Key features: - Temporal knowledge graph tracking fact and relationship changes over time - Sub-200ms memory retrieval at scale - Observations engine surfacing patterns and co-occurrences across interactions - SOC 2, HIPAA, and GDPR compliance on Enterprise plan - Unmetered memory, retrieval, storage, and user counts (credits for episode ingestion only) - Top score on LongMemEval benchmark (63.8%) vs competing memory solutions
Free: $0 (10K message limit). Pro: $99/month (500K messages, unlimited projects). Flex Plus: $375/month (200K credits/month, 60-day rollover, 1,000 req/min). Enterprise: custom (unlimited messages, SOC 2 + HIPAA + GDPR, dedicated support).